Hi, my cpu i5-4670 currently runs up to 100*c whilst gaming! And around 50-60 when im on chrome watching videos on youtube according to cpu-z. Anyway, I think it's time for a new heatsink, however, im unsure on how to buy one... How do I check for compatibility? I've a Geforce GTX 780 for my video card, and 2x4 G-Skill ripjaws ram. I've a B85M-G for a motherboard... Any help would be greatly appreciated! I'm kind of a newbie at building computers.. Thanks!